On 15 July 1941
Chateau Thierry was transferred from Army to Navy and continued operations between
Brooklyn and outposts in Greenland, Iceland, and Nova Scotia during September 1941 and 2 January 1942. With the entry of the United States into the war, she sailed from Brooklyn 15 January 1942 carrying some of the first American troops to cross to
Northern Ireland.
Chateau Thierry sailed on to
Scotland to embark
British troops and sailors for transportation to
Halifax and
New York City. Two more voyages with soldiers from New York to
Argentia, Newfoundland, followed, and on 19 May, she got underway for
Charleston, South Carolina, to embark Army and civilian passengers. She sailed on by way of
Bermuda for a round of calls at
African ports, sailing south around
Cape of Good Hope for
Eritrea, where she landed the last of her passengers and took a new group on board. On her return passage she picked up Navy gun crews and other survivors of two merchant ship sinkings, at west African ports.
Invasion of Sicily Chateau Thierry resumed her transport duty to the North Atlantic until 29 April 1943, when she cleared New York for a voyage to
North Africa, well escorted in a safe passage. Returning to New York, she embarked soldiers and sailors, and cleared 10 June for
Oran, arriving 21 June. Here she prepared for the
invasion of Sicily, for which she sailed 5 July. Assigned to the floating reserve,
Chateau Thierry lay off the hotly contested
Gela beaches 10 July as the assault began, and late in the day began landing her reinforcements, continuing into the night. She remained off Sicily for 2 days, firing to aid in turning back the heavy
German air attacks, and taking on board
Italian prisoners of war. Returning to
Bizerte 13 July she landed the Italians, then returned to
Sicily to embark members of naval units not needed ashore now that the landings had succeeded. Laden with German prisoners of war at Oran,
Chateau Thierry sailed 9 August for New York which she reached 22 August.
Conversion to hospital ship Sailing on to
Boston, she was decommissioned there 9 September 1943, and returned to the Army who used her as a
hospital ship for the remainder of the war. Chateau Thierry was one of the 12 hospital ships that were involved in the Invasion of southern France. The ship was also in North Africa, Sicily and Italy at Anzio. ==Awards==